Best Answer

I had a problem one time with my Chrysler New Yorker. If the power windows would not work then the a/c would not turn on, if I turned the car off and tried the window switch if the window worked the a/c worked. My mechanic said it was a bad ignition switch. He changed it out and no more problems. I believe there may be a code stored in the computer that can be cleared out, if no other problems exist. ----- Here's what you need to do.... (taken from a 4x4 newsboard from "Kevin")

Disconnect the battery negative cable to allow the A/C control module to reset. It has gone into fail safe mode due to excessive cycling of the compressor clutch. Once it is reset you will be able to again run the compressor to diagnose the system. It will go into fail safe if the compressor cycles more than 15 times in one minute or something like that (not exactly sure of the time period). Your compressor will cycle too often if you are low on refrigerant and cause the control module to enter the failure mode. When you reconnect the battery & start the truck, immediately start charging the system with freon.

There is also a known problem with the harness connector to the low pressure clutch cycling switch that can cause the same problem. Many parts supply stores carry the replacement harness connector to fix the problem of poor and intermittent contact at the connector. To test your low pressure cycling switch harness connector, just wiggle it a little bit while the compressor clutch is engaged. If the connector is bad you will notice the clutch cutting in and out as you wiggle the wires going into the connector.

User Avatar

Wiki User

โˆ™ 2006-07-24 22:58:36
This answer is:
User Avatar
Study guides

Add your answer:

Earn +20 pts
Q: Why would the AC light on a 1991 GMC blink but the air conditioner not work?
Write your answer...
Still have questions?
magnify glass
Related questions

What does the green sport light means when it continues to blink on a 1991 Accord?

It is indicating you have a transmission problem.

Why is the AC light blinking on 1991 Toyota Camry?

If an AC light is blinking on a 1991 Toyota Camry it may indicate that a belt is slipping. The AC light may also blink indicating that the system has been overcharged.

On a 1991 Volvo What causes the transmission arrow to blink on the dashboard?

That's the OD warning light, Check wiring, relay, Solenoid, and switch

What are the release dates for Bucky O'Hare and the Toad Wars - 1991 On the Blink 1-5?

Bucky O'Hare and the Toad Wars - 1991 On the Blink 1-5 was released on: USA: 6 October 1991

Why does the seat belt warning light continuously blink on a 1991 Acura Integra even when the seat belts are latched?

The sensor that detects its in is probably broken.

How do you charge your air conditioner on your 1991 Toyota Previa and what kind of freon do you use?

Would have been built for R12, can be converted to R134a.

Should the security light on a 1991 Deville blink when the doors are unlocked and the engine is off?

Yes, but only when a door is open, when you hit the lock button and close the doors it should go off

What causes the sport mode light to blink the speedometer to stop working and loss of power all at the same time on a 1991 Honda Accord EX?

In my experience that is a failure of the alternator or something connected to it.

Where is the relay switch for the air conditioner on a 1991 Toyota Previa?

.....still lookin'

What kind of Air conditioner fluid for 1991 Ford Ranger?

R 12

How do you replace the air conditioner filter of 1991 Honda Accord?

The 1991 Honda Accord is not equipped with an A/C filter or Cabin Filter.

Can a air conditioner compressor on a 1999 F-450 fit a 1991 ford ranger?


People also asked